Upconversion emission in Er3+/Yb3+-codoped YVO4 crystals

被引：42

作者：

Tsuboi, T ^{[1
]}

机构：

[1] Kyoto Sangyo Univ, Fac Engn, Kita Ku, Kyoto 6038555, Japan

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.62.4200

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Upconversion by Yb3+ sensitization in Er3+-doped YVO4 crystals has been studied under excitation with a 976 nm laser diode. In addition to the previously observed upconverted 526 and 554 nm Er3+ emission bands, three weak upconverted Er3+ emission bands are observed at 490, 660, and 670 nm at room temperature. From the quadratic pump-power dependence, it is confirmed that the upconversion is induced by a two-photon excitation process involving excited-state absorption from the I-4(11/2) state of Er3+. In addition to these emission bands, downconverted Yb3+ and Er3+ emission bands are simultaneously observed at 1010 and 1470-1630 am. respectively. It is observed that the infrared Er3+ emission intensity increases linearly with pump power, while the Yb3+ emission intensity saturates gt higher pump powers.

引用

页码：4200 / 4203

页数：4

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